Nutrient controls on carbohydrate and lignin decomposition in beech litter

Kohl, Leonie; Wanek, Wolfgang; Keiblinger, Katharina; Hämmerle, Ieda; Fuchslueger, Lucia; Schneider, Thomas; Riedel, Katharina; Eberl, Leo; Zechmeister‐Boltenstern, Sophie; Richter, Andreas

doi:10.1016/j.geoderma.2022.116276

Cited by 4 publications

(1 citation statement)

References 48 publications

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“…Thus, phenylalamine ammonia-lyase and cinnamate dehydrogenase may be primarily involved in removing reactive oxygen species. Laccase is one of the main oxidizing enzymes in lignin degradation [53]. The decrease in leaves' lignin content was attributed to the increase in catabolic enzyme activities such as regulating laccase by alginate oligosaccharides (Figure 4d), which regained lignin to normal levels.…”

Section: Discussionmentioning

confidence: 99%

Alginate Oligosaccharides Alleviate Salt Stress in Rice Seedlings by Regulating Cell Wall Metabolism to Maintain Cell Wall Structure and Improve Lodging Resistance

Du,

Zhao,

Feng

et al. 2024

Plants

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Salt stress is one of the major abiotic stresses that damage the structure and composition of cell walls. Alginate oligosaccharides (AOS) have been advocated to significantly improve plant stress tolerance. The metabolic mechanism by which AOS induces salt tolerance in rice cell walls remains unclear. Here, we report the impact of AOS foliar application on the cell wall composition of rice seedlings using the salt-tolerant rice variety FL478 and the salt-sensitive variety IR29. Data revealed that salt stress decreased biomass, stem basal width, stem breaking strength, and lodging resistance; however, it increased cell wall thickness. In leaves, exogenous AOS up-regulated the expression level of OSCESA8, increased abscisic acid (ABA) and brassinosteroids (BR) content, and increased β-galacturonic activity, polygalacturonase activity, xylanase activity, laccase activity, biomass, and cellulose content. Moreover, AOS down-regulated the expression levels of OSMYB46 and OSIRX10 and decreased cell wall hemicellulose, pectin, and lignin content to maintain cell wall stability under salt stress. In stems, AOS increased phenylalamine ammonia-lyase and tyrosine ammonia-lyase activities, while decreasing cellulase, laccase, and β-glucanase activities. Furthermore, AOS improved the biomass and stem basal width and also enhanced the cellulose, pectin, and lignin content of the stem, As a result, increased resistance to stem breakage strength and alleviated salt stress-induced damage, thus enhancing the lodging resistance. Under salt stress, AOS regulates phytohormones and modifies cellulose, hemicellulose, lignin, and pectin metabolism to maintain cell wall structure and improve stem resistance to lodging. This study aims to alleviate salt stress damage to rice cell walls, enhance resistance to lodging, and improve salt tolerance in rice by exogenous application of AOS.

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Section: Discussionmentioning

confidence: 99%

Alginate Oligosaccharides Alleviate Salt Stress in Rice Seedlings by Regulating Cell Wall Metabolism to Maintain Cell Wall Structure and Improve Lodging Resistance

Du,

Zhao,

Feng

et al. 2024

Plants

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Insight in molecular degradation patterns and co-metabolism during rose waste co-composting

de Nijs,

Jansen,

Absalah

et al. 2023

Biogeochemistry

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Composting is recognized as a sustainable waste management strategy. However, little is known about green waste, and specifically rose waste, degradation patterns during composting. This study aimed (1) to gain insight in the underlying decomposition patterns during rose waste composting and (2) to identify co-metabolisms of ligneous material. Five different compost mixtures were tested ranging from pure rose waste to mixtures with tomato waste, kalanchoe waste or mature compost added. Samples were taken during a six-month experiment and analyzed by pyrolysis-GC/MS. The temporal trends in the relative abundance of 10 different compound groups were measured. Lignin and aliphatic compounds together accounted for ≥ 50% of the quantified pyrolysis products, but with changing contributions during composting. The relative abundance of polysaccharides and terpenes strongly decreased with more than 60% in the first 2 months. The simultaneous decrease in relative abundance of lignin and polysaccharides during initial composting phase indicated co-metabolism of lignin. The results from this study showed that while the presence of lignin is commonly regarded as a challenge in composting, it actually undergoes degradation through distinct mechanisms at the various composting stages.

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Bioprospecting lignin for biorefinery: Emerging innovations and strategies in microbial technology

Verma,

Chettri,

Verma

et al. 2024

Biomass and Bioenergy

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Nutrient controls on carbohydrate and lignin decomposition in beech litter

Cited by 4 publications

References 48 publications

Alginate Oligosaccharides Alleviate Salt Stress in Rice Seedlings by Regulating Cell Wall Metabolism to Maintain Cell Wall Structure and Improve Lodging Resistance

Alginate Oligosaccharides Alleviate Salt Stress in Rice Seedlings by Regulating Cell Wall Metabolism to Maintain Cell Wall Structure and Improve Lodging Resistance

Insight in molecular degradation patterns and co-metabolism during rose waste co-composting

Bioprospecting lignin for biorefinery: Emerging innovations and strategies in microbial technology

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